Initial implementation of Encrypted Media Extensions in Chrome.

webkit/media/key_systems.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_MEDIA_KEY_SYSTEMS_H_
+#define WEBKIT_MEDIA_KEY_SYSTEMS_H_
+
+#include <string>
+#include <vector>
+
+namespace WebKit {
+class WebString;
+}
+
+namespace webkit_media {
+
+namespace key_systems {
+
+// Returns whether |key_sytem| is supported at all.
+// Call IsSupportedKeySystemWithMediaMimeType() to determine whether a
+// |key_system| supports a specific type of media.
+bool isKeySystemSupported(const WebKit::WebString& key_system);

[scherkus (not reviewing), 2012/04/17 23:30:53]

is -> Is


OCD nit: this functions aren't consistent in their noun-verbage

IsNounVerb()
IsVerbNounWithNoun()

in other words... why not have:
IsSupportedKeySystem()
IsSupportedKeySystemWithMimeType()

[ddorwin, 2012/04/18 05:17:01]

Done.

The parameter types are still inconsistent, but this avoids conversion at all
the call sites. I guess you could look at it as using WebKit types except for
the next function where all the types are STL where it is used.

+
+// Returns whether |key_sytem| supports the specified media type and codec(s).
+bool IsSupportedKeySystemWithMediaMimeType(
+    const std::string& mime_type,
+    const std::vector<std::string>& codecs,
+    const std::string& key_system);
+
+}  // namespace key_systems
+
+}  // namespace webkit_media
+
+#endif  // WEBKIT_MEDIA_KEY_SYSTEMS_H_